How to change connection string dynamically for entity framework?

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Hi all,

in one of my project we have a need to change database connection dynamically. website is build using asp.net mvc 4 and entity framework. currently we create entity framework class by adding it from add new item and apply the connection string from wizard only. now what we need is admin can change server settings and that will be saved in one of the xml file in the root directory. we need to concatenate the server details and apply a new connection string to entity framework class.

can someone please give me idea.

Posted 26-Feb-14 17:43pm

ravikhoda

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Maciej Los 27-Feb-14 15:28pm

What's the problem?

ravikhoda 27-Feb-14 22:38pm

problem is that now my connection string is not fixed and we need to change datasource initial catalog based on xml file which is separate from Web config file. how to update web config file connection string based on that xml file.

Maciej Los 28-Feb-14 1:53am

That is no problem. See updated answer ;)

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Maciej Los · Answer 1 · 2014-02-27T09:38:00

I have no idea what kind of issue do you have... You did provide enough information about your needs. Now, you need to start coding. That's all.

Please see: Connection Strings and Configuration Files[^]. It might help you.

[EDIT]

Quote:
problem is that now my connection string is not fixed and we need to change datasource initial catalog based on xml file which is separate from Web config file. how to update web config file connection string based on that xml file.

The simplest way i can imagine is:
1) create[^] DataTable[^] object
2) add columns[^] and rows[^] (data)
3) save DataTable data to Xml file[^]
That's all! ;)

Tip: to get data from xml, use DataTable,ReadXml method[^]

There is many other ways to achieve that, for example using XML DOM document, XMLWriter, etc.

[/EDIT]